CN119010929A - A method for frequency hopping power calibration - Google Patents
A method for frequency hopping power calibration Download PDFInfo
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- CN119010929A CN119010929A CN202411195475.0A CN202411195475A CN119010929A CN 119010929 A CN119010929 A CN 119010929A CN 202411195475 A CN202411195475 A CN 202411195475A CN 119010929 A CN119010929 A CN 119010929A
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- 238000001514 detection method Methods 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000012937 correction Methods 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000012549 training Methods 0.000 abstract description 9
- 230000004044 response Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000009191 jumping Effects 0.000 abstract 1
- 230000003321 amplification Effects 0.000 description 12
- 238000003199 nucleic acid amplification method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 241001125929 Trisopterus luscus Species 0.000 description 3
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- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/045—Circuits with power amplifiers with means for improving efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention belongs to the field of frequency hopping power calibration technology and discloses a method for frequency hopping power calibration, comprising amplifier one, amplifier one electrically connected to an adjustable attenuator, the adjustable attenuator electrically connected to an amplifier module, the amplifier module electrically connected to an ADC, and the ADC The electrical output connection has a control algorithm module, and the control algorithm module is connected to an adjustable attenuator. The present invention is based on a feedback control scheme, which finds an intermediate variable between adjacent pulses. The transmission power of the previous pulse can be used as a reference for the transmission power of the next pulse. Compared with traditional feedback control schemes, there is no need to insert a training signal segment before the current pulse, avoiding the problem of pulse transmission power jumping. Moreover, due to the high real-time power detection scheme, the response speed of the system is much higher than that of the feedforward control scheme based on temperature detection. Using this scheme can effectively solve the problem of transmission power consistency in fast frequency hopping systems.
Description
Technical Field
The invention belongs to the technical field of frequency hopping power calibration, and particularly relates to a frequency hopping power calibration method.
Background
In the existing power calibration method based on temperature detection, due to hysteresis in temperature detection and rapid temperature change characteristic in power amplification transmission, a control value is delayed from the power amplification transmission characteristic, so that a deviation amount exists between the power amplification transmission power and a set value all the time, and the consistency of the transmission power of a system is limited by the deviation amount.
The existing feedback control scheme based on the detection of the transmitting power needs to insert a training signal section in the front of each pulse, when the transmitting signal section is transmitted, the transmitting power deviation is larger, so that the transmitting power in one pulse is greatly fluctuated, although the transmitting power of the subsequent data section is more accurate, the application range is limited to a certain extent, the system efficiency is obviously reduced due to the fact that the training signal section is inserted, in a high-speed frequency hopping system, the temperature detection reaction is slow, the jump speed is high, the pulse is short, and the training signal section for transmitting power calibration cannot be inserted in the pulse, so that the transmitting power consistency deviation in the whole frequency range is caused.
Disclosure of Invention
In order to solve the problem that the transmission power consistency deviation in the full frequency range is caused by the fact that the training signal segment for transmission power calibration cannot be inserted into the pulse due to the fact that the temperature detection reaction is slow, the jump speed is high and the pulse is short in the high-speed frequency hopping system in the background technology, the invention provides a frequency hopping power calibration method.
In order to achieve the above purpose, the present invention provides the following technical solutions: the frequency hopping power calibration method comprises an amplifier I, wherein the electrical output of the amplifier I is connected with an adjustable attenuator, the electrical output of the adjustable attenuator is connected with an active amplification module, the electrical output of the active amplification module is connected with an ADC, the electrical output of the ADC is connected with a control algorithm module, and the electrical output of the control algorithm module is connected with the adjustable attenuator;
the frequency hopping power calibration method based on the frequency hopping power calibration system comprises the following specific steps:
step 1: a signal is input and is input to the adjustable attenuator through the first amplifier;
step 2: the power amplifier input power is controlled by adjusting the adjustable attenuator, so that the power amplifier output power is controlled;
Step 3: detecting the output power of the power amplifier, adjusting the power of the signal, detecting the power of the signal by the power amplifier module, converting the radio frequency signal into voltage and outputting the voltage;
Step 4: generating a power correction table, and outputting the power correction table through a control algorithm module, specifically traversing in an incubator: frequency points, temperature and power amplifier input power to obtain corresponding power amplifier output power, wherein each frequency point is provided with a table for a power calibration algorithm;
Step 5: and the feedback control is carried out, according to the emission characteristics of the previous pulse, including output power, input power and frequency, the temperature of the previous pulse is inquired from a power correction table, and according to the temperature of the previous pulse, the frequency of the current pulse and the output power of the current pulse, the input power of the current pulse is inquired from the power correction table. And controlling the adjustable attenuator to enable the transmitting power of the power amplifier to meet the requirement of a set value.
Preferably, the power amplification module comprises a second amplifier, the input end of the second amplifier is electrically connected with the adjustable attenuator, the electrical output of the second amplifier is connected with a directional coupler, the directional coupler outputs the power amplifier outwards, and the electrical output of the directional coupler is connected with a power detector.
Preferably, the adjustable attenuator is used for controlling the power of the power amplifier input signal, and a numerical control attenuator is selected.
Preferably, the directional coupler is used for coupling out signals on a transmitting path to perform power detection under the condition that the output power of the power amplifier is not lost as much as possible.
Preferably, the power detector is a radio frequency power detector, and converts a radio frequency signal into a voltage for output.
Preferably, the first amplifier and the adjustable attenuator are combined to successfully put into the power control circuit, and the adjustable attenuator is subjected to attenuation control through the control algorithm module.
Preferably, the second amplifier, directional coupler, power detector and ADC combine to successfully amplify the output power detection circuit.
Preferably, the directional coupler is electrically connected with a power meter, and the power meter is electrically connected with a control algorithm module through an output of the power meter, and outputs a power correction table through the control algorithm module.
Preferably, in step 5, the current power amplifier tube temperature is reversely queried from the power calibration table according to the transmitting power of the previous pulse, so as to control the transmitting power of the next pulse.
Compared with the prior art, the invention has the following beneficial effects:
The invention finds an intermediate variable between two adjacent pulses based on the feedback control scheme, the transmitting power of the last pulse can be used as the reference of the transmitting power of the next pulse, compared with the traditional feedback control scheme, the invention avoids the problem of pulse transmitting power jump without inserting a training signal section in front of the current pulse, and the response speed of the system is far higher than that of the feedforward control scheme based on temperature detection due to the power detection scheme based on high real-time performance.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the power amplifier input power control circuit of the present invention;
FIG. 3 is a schematic diagram of the output power detection circuit of the driving power amplifier of the present invention;
FIG. 4 is a flow chart of the feedback control steps of the present invention;
FIG. 5 is a graph showing the relationship between the power amplifier input power and the power amplifier output power according to the present invention;
FIG. 6 is a graph showing the relationship between the input power and the attenuation value of the power amplifier according to the present invention;
FIG. 7 is a graph showing the relationship between the output power of the power amplifier and the output power of the coupling port of the coupler;
FIG. 8 is a graph of the power amplifier output power versus power detection voltage according to the present invention;
fig. 9 is a schematic diagram of power amplifier output power value detection according to the present invention.
In the figure: 1. an amplifier I; 2. an adjustable attenuator; 3. a power amplifier module; 301. an amplifier II; 302. a directional coupler; 303. a power detector; 4. an ADC; 5. a control algorithm module; 6. a power meter.
Detailed Description
The invention is described in further detail below with reference to fig. 1-9.
In this embodiment, a method for calibrating frequency hopping power solves the problem that in the existing high-speed frequency hopping system, due to slow temperature detection reaction, high frequency hopping speed and short pulse, a training signal segment for transmitting power calibration cannot be inserted into the pulse, so that the transmitting power consistency within the full frequency range is deviated, and includes:
The electric output of the first amplifier 1 is connected with an adjustable attenuator 2, the electric output of the adjustable attenuator 2 is connected with an active amplifier module 3, the electric output of the active amplifier module 3 is connected with an ADC4, the electric output of the ADC4 is connected with a control algorithm module 5, and the electric output of the control algorithm module 5 is connected with the adjustable attenuator 2.
The power amplification module 3 comprises a second amplifier 301, the input end of the second amplifier 301 is electrically connected with the adjustable attenuator 2, the electrical output of the second amplifier 301 is connected with a directional coupler 302, the directional coupler 302 outputs power amplification outwards, and the electrical output of the directional coupler 302 is connected with a power detector 303.
The adjustable attenuator 2 is used for controlling the power of the power amplifier input signal, a numerical control attenuator is selected, the smaller the attenuation step is, the better the attenuation step is, the more general 0.2dB is, and the attenuation range is generally 0-35 dB.
The directional coupler 302 is used for coupling out the signal on the transmitting path for power detection under the condition of not losing the output power of the power amplifier as much as possible.
The power detector 303 is a radio frequency power detector, and converts a radio frequency signal into a voltage and outputs the voltage.
The first amplifier 1 and the adjustable attenuator 2 are combined to successfully amplify the input power control circuit, and the attenuation control is performed on the adjustable attenuator 2 through the control algorithm module 5.
The amplifier two 301, the directional coupler 302, the power detector 303 and the ADC4 are combined to successfully amplify the output power detection circuit.
The directional coupler 302 is electrically connected with a power meter 6, the power meter 6 is electrically connected with a control algorithm module 5 in an output mode, and a power correction table is output through the control algorithm module 5, specifically, traversing in an incubator: frequency points, temperature and power amplifier input power to obtain corresponding power amplifier output power, and each frequency point is used for a power calibration algorithm.
The frequency hopping power calibration method based on the frequency hopping power calibration system comprises the following specific steps:
step 1: a signal is input and is input to the adjustable attenuator through the first amplifier;
step 2: the power amplifier input power is controlled by adjusting the adjustable attenuator, so that the power amplifier output power is controlled;
Step 3: detecting the output power of the power amplifier, adjusting the power of the signal, detecting the power of the signal by the power amplifier module, converting the radio frequency signal into voltage and outputting the voltage;
Step 4: generating a power correction table, transmitting the output voltage signal to a control algorithm module, and outputting the power correction table through the control algorithm module, specifically traversing in an incubator: frequency points, temperature and power amplifier input power to obtain corresponding power amplifier output power, wherein each frequency point is provided with a table for a power calibration algorithm;
Step 5: and the feedback control is carried out, according to the emission characteristics of the previous pulse, including output power, input power and frequency, the temperature of the previous pulse is inquired from a power correction table, and according to the temperature of the previous pulse, the frequency of the current pulse and the output power of the current pulse, the input power of the current pulse is inquired from the power correction table. And controlling the adjustable attenuator to enable the transmitting power of the power amplifier to meet the requirement of a set value, and in the step 5, reversely inquiring the current power amplifier tube temperature from the power calibration table according to the transmitting power of the previous pulse to control the transmitting power of the next pulse.
The scheme is adopted: the signal is amplified by the first amplifier 1 and then is transmitted to the adjustable attenuator 2, the adjustable attenuator 2 controls the attenuation value from the input end to the output end by the control signal given by the control algorithm module 5, the adjustment of the signal power of the output end is realized, the signal is amplified by the second amplifier 301 and then is transmitted to the directional coupler 302, the directional coupler 302 is used for coupling the radio frequency signal with fixed proportion to the power detector 303, the power detector 303 converts the radio frequency signal power into an analog signal capable of accurately reflecting the signal power in real time, and the analog signal is converted into a digital signal after passing through the ADC4 and then is transmitted to the control algorithm module 5.
The power amplifier input power is controlled by adjusting the adjustable attenuation, so that the power amplifier output power is controlled, the power detection output and the power amplifier output power are in a proportional relation, and the power detection output can accurately reflect the power amplifier output power.
As shown in fig. 4, pulse 1 and pulse 2 are two adjacent pulses, pulse 1 corresponds to frequency F1, and pulse 2 corresponds to frequency F2. The design inquires corresponding temperature from a power correction table as an intermediate variable according to the output power of the pulse 1 and the input power of the power amplifier at the frequency F1, and inquires the output power of the power amplifier according to the temperature of the intermediate variable, the frequency F2 and the set output power of the power amplifier before the pulse 2 is transmitted, and the control algorithm module 5 controls the attenuation value of the adjustable attenuator 2 to ensure that the input power of the power amplifier is the same as the input power of the power amplifier obtained by inquiry.
As shown in fig. 5, the power amplifier characteristics are closely related to frequency, temperature and input power, and in order to realize accurate control of the power amplifier output power, it is first necessary to determine the characteristics of the power amplifier under various conditions, and it is necessary to traverse all conditions, and traverse in an incubator: frequency points, temperature and power amplifier input power to obtain corresponding power amplifier output power, and each frequency point is used for a power calibration algorithm.
During power correction, a power meter is used for measuring the output power of the power amplifier in real time, the power detection output and the output power value of the power amplifier are in a proportional relation, and the mapping relation is determined in the correction process.
At a temperature resolution of 10 degrees celsius, a power resolution of 0.1dBm is exemplified as follows:
the attenuation value is inversely related to the power amplifier input power as shown in fig. 6.
The directional coupler 302 is used for coupling out the signal on the transmitting path for power detection under the condition of not losing the output power of the power amplifier as much as possible. The directional coupler 302 needs to be selected according to the transmitting power and the frequency range, and the coupling degree is more than 20 dB. The relationship between the output power of the coupling port and the output power of the power amplifier is shown in fig. 7.
The power detection is completed by using a radio frequency power detector, and radio frequency signals are converted into voltages to be output. For convenient use, the detector can be an RMS detector, the detection dynamic range is selected according to the range which needs to be controlled by the output power, the 35dB of the general dynamic range can meet the requirement, and the logarithmic slope is generally not less than 35mV/dB. The relationship between the output power of the power amplifier and the detected voltage is shown in fig. 8.
Variables associated with the feedback control algorithm are as follows:
target power: p
Output power of the power amplifier: pout
Power amplifier input power: pin
Frequency: f
Temperature: t
Attenuation value: ATT (automatic Tet)
Taking fig. 4 as an example, the feedback control algorithm steps are as follows:
During the pulse 1 transmitting period, detecting the power amplifier output power Pout (1) in real time;
Recording the power amplifier input power Pin (1) when the pulse 1 is transmitted;
recording the frequency F (1) at which pulse 1 is emitted;
Look-up table yields the temperature T (1) =lut (F (1), pout (1), pin (1)) at the time of pulse 1 emission;
according to the temperature T (1), the target power P is searched to obtain the power amplifier input power Pin (2) =LUT (F (2), P, T (1)) of the pulse 2;
obtaining ATT (2) according to Pin (2);
prior to the transmission of pulse 2, ATT (2) is configured to the adjustable attenuator 2.
The feedforward control scheme based on temperature detection detects the temperature of the power amplification tube in real time, searches the excitation value given to the power amplification at the current temperature from a power calibration table trained in advance according to the detected temperature, and controls the gain of the transmitting link so that the excitation value given to the power amplification meets the excitation value of the current temperature, thereby enabling the transmitting power of the power amplification to meet the requirement of a set value.
A feedback control scheme based on real-time detection of the transmitting power is characterized in that a training signal section is inserted in front of each pulse and used for detecting the transmitting power value under the current frequency, the exciting value variation quantity to be adjusted is calculated according to the power value, and corresponding adjustment is carried out according to a variation quantity system, so that the transmitting power of the power amplifier meets the requirement of a set value.
In addition, in the present invention, the intermediate variable is defined as temperature, but may not be defined as temperature, for example, named "intermediate variable X", "equivalent variable", or the like.
The invention solves the problems of temperature detection lag and full system response in the temperature detection feedforward control scheme, and the scheme has high response speed.
The invention solves the problem that the training signal segment needs to be inserted in the feedback control scheme, and the scheme expands the application range of the feedback control system and improves the efficiency of the system.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A method for calibrating frequency hopping power, characterized by: the frequency hopping power calibration method comprises an amplifier I, wherein the electrical output of the amplifier I is connected with an adjustable attenuator, the electrical output of the adjustable attenuator is connected with an active amplifier module, the electrical output of the active amplifier module is connected with an ADC, the electrical output of the ADC is connected with a control algorithm module, and the electrical output of the control algorithm module is connected with the adjustable attenuator;
the frequency hopping power calibration method based on the frequency hopping power calibration system comprises the following specific steps:
step 1: a signal is input and is input to the adjustable attenuator through the first amplifier;
step 2: the power amplifier input power is controlled by adjusting the adjustable attenuator, so that the power amplifier output power is controlled;
Step 3: detecting the output power of the power amplifier, adjusting the power of the signal, detecting the power of the signal by the power amplifier module, converting the radio frequency signal into voltage and outputting the voltage;
Step 4: generating a power correction table, transmitting the output voltage signal to a control algorithm module, and outputting the power correction table through the control algorithm module, specifically traversing in an incubator: frequency points, temperature and power amplifier input power to obtain corresponding power amplifier output power, wherein each frequency point is provided with a table for a power calibration algorithm;
Step 5: and the feedback control is carried out, according to the transmission characteristics of the previous pulse, including output power, input power and frequency, the temperature of the previous pulse is inquired from a power correction table, and according to the temperature of the previous pulse, the current pulse frequency and the current pulse output power, the input power of the current pulse is inquired from the power correction table, and the adjustable attenuator is controlled, so that the transmission power of the power amplifier meets the requirement of a set value.
2. The method of frequency hopping power calibration as claimed in claim 1, wherein: the power amplifier module comprises an amplifier II, the input end of the amplifier II is electrically connected with the adjustable attenuator, the electrical output of the amplifier II is connected with a directional coupler, the directional coupler outputs the power amplifier outwards, and the electrical output of the directional coupler is connected with a power detector.
3. The method of frequency hopping power calibration as claimed in claim 2, wherein: the adjustable attenuator is used for controlling the power of the power amplifier input signal, and a numerical control attenuator is selected.
4. The method of frequency hopping power calibration as claimed in claim 2, wherein: the directional coupler is used for coupling out signals on a transmitting path to detect power under the condition that the output power of the power amplifier is not lost as much as possible.
5. The method of frequency hopping power calibration as claimed in claim 2, wherein: the power detector is a radio frequency power detector, and converts radio frequency signals into voltages for output.
6. The method of frequency hopping power calibration as claimed in claim 1, wherein: the first amplifier and the adjustable attenuator are combined to be successfully put into the power control circuit, and the adjustable attenuator is subjected to attenuation control through the control algorithm module.
7. The method of frequency hopping power calibration as claimed in claim 2, wherein: the second amplifier, the directional coupler, the power detector and the ADC combine to successfully amplify the output power detection circuit.
8. The method of frequency hopping power calibration as claimed in claim 2, wherein: the directional coupler is electrically connected with a power meter, and the power meter is electrically connected with the control algorithm module.
9. The method of frequency hopping power calibration as claimed in claim 1, wherein: in step 5, the current power amplifier tube temperature is reversely queried from the power calibration table according to the transmitting power of the previous pulse, so as to control the transmitting power of the next pulse.
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| CN202411195475.0A CN119010929A (en) | 2024-08-29 | 2024-08-29 | A method for frequency hopping power calibration |
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| CN202411195475.0A CN119010929A (en) | 2024-08-29 | 2024-08-29 | A method for frequency hopping power calibration |
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